Drain assembly for drain pipe

ABSTRACT

According to the invention, a drain assembly adapts a drain pipe for operative connection to a basin. The drain pipe is provided with a compressible resilient liner which is at least partially received in the drain pipe. A substantially rigid sleeve is forcibly inserted into the liner compressing it radially outward against the encircling drain pipe. The sleeve is especially suited for forming the drain of the basin and the compressed liner forms a sealed interface between the basin drain and the drain pipe, thereby operatively coupling the drain pipe to the basin.

United States Patent [451 Nov. 21, 1972 Demler, Sr.

[54] DRAIN ASSEMBLY FOR DRAIN PIPE [72] Inventor: Henry William Demler, Sr.,

Lebanon, Pa.

[73] Assignee: AMP Incorporated, Harrisburg, Pa.

[22] Filed: March 26, 1971 [21] Appl. No.: 128,296

[52] US. Cl. ..285/161, 285/42, 285/206 [51] Int. Cl ..Fl6l 5/00 [58] Field of Search ..4/286, 290; 285/15, 42, 56,

[56] References Cited UNITED STATES PATENTS 3,501,172 3/1970 Pickard ..285/59 2,582,031 l/1952 Harbison ..285/42 X 3,076,668 2/1963 Famely ..285/159 1,887,423 11/1932 Parker ..285/206 2,497,986 2/1950 Goode ..285/302 X 2,638,126 5/1953 Hord ..285/42 X Schoepe et al ..285/161 X Harrell ..285/58 Primary Examiner-David J. Williamowsky Assistant Examiner-David l-l. Corbin Att0mey-William J. Keating, Ronald D. Grefe, Gerald K. Kita, Frederick W. Raring, Jay L. Seitchik, John R. Flanagan and Allen B. Osborne 5 7 ABSTRACT 1 Claim, 4 Drawing Figures PATENTEDImm I972 INVENTOR i HENRY WILLIAM DEMLER'SR BY' GERALD'K. KITA DRAIN ASSEMBLY FOR DRAIN PIPE The present invention generally relates to a drain assembly for a drain pipe. More specifically, the present invention provides a drain assembly for a basin or a basin liner which is operatively coupled to drain pipe without the need for conventional fastening techniques.

There has been a long existing need in the plumbing art for quickly connecting plumbing drain to a basin or a basin liner of a sink or tub. The present invention provides a reliable drain assembly, quickly connected without a need for cumbersome tools and without the drawbacks of conventional fastening techniques.

Therefore, it is an object of the present invention to provide a drain assembly for. operatively coupling a plumbing drain and a basin.

A further object of the present invention is to provide a drain assembly which operatively couples a basin or a basin liner and a plumbing drain without the need for cumbersome tools.

A further object of the present invention is to provide a method for operatively connecting a drain assembly between a basin and a plumbing drain without the drawbacks of conventional fastening techniques.

Other objects and many attendant advantages of the present invention will become apparent upon perusal of the following detailed description taken in conjunction with the accompanying drawing, wherein:

FIG. I is a fragmentary elevation in section of a preferred embodiment according to the invention with parts partially exploded to illustrate the details thereof;

FIG. 2 is a fragmentary elevation in section of the embodiment as shown in FIG. 1 with parts fully assembled and showing a basin coupled to a drain pipe by a preferred embodiment of the drain assembly of FIG. 1;

FIG. 3 is a fragmentary elevation in section with parts exploded illustrating a modification of the preferred embodiment as shown in FIG. 1; and

FIG. 4 is a fragmentary elevation in section of the preferred embodiment as shown in FIG. 3 in fully assembled condition and coupling a basin to a drain pipe.

With more particular reference to FIG. 1, there is shown generally at l a drain assembly according to the present invention. As shown, a plumbing drain pipe 2 is positioned adjacent to a drain orifice 4 of a basin 6. In one preferred application, the drain pipe is provided with an end portion 8 threadably inserted within an internally threaded portion 10 of the drain pipe 2. The end portion 8 includes a grid portion 12 preventing objects from falling into the drain pipe 2. The insert 8 further includes an enlarged radially projecting flange portion 14 which overlies in sealing relationship a portion of a basin 6 which surrounds the orifice 4. It is often desirable to rejuvenate a chipped or otherwise damaged basin 6 with a liner, such as the one shown at 16. The liner 16 thus overlies the damaged basin 6 and thereby serves as a new basin in place of the damaged original basin 6. The liner 16 is provided with a drain orifice 18 which must be operatively coupled to the drain pipe 2. Accordingly, a generally cylindrical resiliently deformable insert in the form of a sleeve 20 is received within the drain pipe portion 8. The exterior cylindrical surface of the liner 20 is externally threaded at 22 and is threadably received within an enlarged internally threaded nut or washer 24. As shown in the Figure. the nut or washer 24 is in registration with and overlies the flange portion 14 of the drain pipe portion 8. The liner 20 is provided at one end thereof with an enlarged radially projecting rim 26 adjustably positioned immediately adjacent to the liner 16 by suitably threadably adjusting the washer 24 longitudinally of the cylindrical portion of the liner 20. The space between the original basin 6 and the overlying basin liner 16 is packed with a suitable filler 28 thereby providing a firm base for the basin liner 16. A generally cylindrical sleeve 30 of a rigid material such as metal is provided at one end thereof with a drain orifice 32. The other end of the rigid sleeve 30 is provided with a radially outward projecting rim portion 34. The rigid sleeve 30 is received through the orifice 18 and centrally within the liner 20 as shown in FIG. 1.

As shown in FIG. 2, when the rigid sleeve 30 is fully inserted within the resiliently deformable liner 20, at least a portion of the liner 20 is compressibly sandwiched between the rigid sleeve 30 and the outer encircling drain pipe portion 8, which is also of rigid material. The rim 34 of the sleeve 30 overlies a portion of the basin liner 18 which surrounds the orifice 18 thereby forming a drain assembly for the basin 16.

With reference again to FIG. 1, a further feature of the invention will be discussed in detail. To enhance the sealable relationship between the rigid sleeve 30 and the drain pipe insert 8, at least a portion of the liner 20 is provided with a tapered sidewall portion 36 immediately adjacent to a radially reduced internal diameter portion 38 of the insert. Thus as the rigid sleeve 30 is forcibly inserted internally of the liner 20, the tapered sidewall 36 provides a graduated lead-in surface for receiving the sleeve 30, allowing the sleeve 30 to be forcibly inserted within the radially reduced portion 38. Although the entire portion of the insert 20 which is received internally of the drain pipe insert 8 is radially compressed as described, the reduced diameter portion 38 thereof is substantially resiliently deformed in compression between the sleeve 30 and the drain pipe portion 8 to provide a relatively concentrated residual stress which radially grips the sleeve 30, to prevent pull-out thereof and to enhance the sealing relationship with respect to the drain pipe.

With more particular reference to FIGS. 3 and 4, a modification of the preferred embodiment will be described in detail. As shown in FIG. 3, the resiliently deformable liner 20 includes the reduced portion 38 located medially of the cylindrical length of the liner 20. The tapered lead-in surface 36 is much more abrupt than the gradually tapered surface 36 of the embodiment shown in FIG. 1. Thus, with reference to FIG. 4, when the insert 30 is forcibly received within the resiliently deformable liner 20, the residual stress concentrations that result when the liner 20 is compressed radially between the insert and the sleeve 30 and the drain pipe insert 8, will be located medially of the cylindrical length of the liner 20 instead of adjacent one end portion of the liner embodiment as shown in FIGS. 1 and 2.

As an additional feature which is not generally required, but rather is optional, an internal annular groove 42 may be provided in the interior cylindrical sidewall of the drain pipe insert 8. Accordingly, as shown in FIG. 4, when the groove 42 is optionally provided, the radially projecting portion 38 of the liner 20 will be compressed and deformed externally to partially fill the groove 42 and further to enhance the sealing and gripping properties of the drain assembly as shown in FIGS. 3 and 4.

As yet another feature of the present invention, the embodiment shown in FIGS. 3 and 4 obviate the need for a washer 24 as shown in FIGS. 1 and 2, since the lip 26 of the liner shown in P16. 3 spans the entire distance separating the basin 6 and the basin liner 16. Thus, there is no need to threadably adjust the liner 20 as required in the embodiments shown in FIGS. 1 and 2.

it should be understood that the features described may be individually or collectively applied in the modification of each of the embodiments shown and described. Additionally, other modifications and embodiments will become obvious to one having ordinary skill in the art as discerned from the spirit and scope of the present invention. Such other modifications and embodiments are intended to be covered fully by the spirit and scope of the present invention as defined by the appended claims, wherein:

What is claimed is:

l. A drain assembly useful for connecting a basin liner having an opening therein, which comprises a drain pipe having an outwardly extending flange thereon;

a resilient, annular drain pipe liner having an encircling lip with a compressible, cylindrical member extending therefrom, a portion of said cylindrical member being received within said drain pipe, said portion having a radially reduced internal diameter portion of smaller inner diameter than the inner diameter of said cylindrical member adjacent said lip and having an internal tapered sidewall portion immediately adjacent said reduced diameter portion;

a rigid sleeve having an annular rim at one end, said sleeve having an outer diameter larger than the inner diameter of said reduced diameter portion and said tapered sidewall portion, said sleeve adapted to be inserted through said opening in said basin liner so that said basin liner is positioned between said rim and said encircling lip on said drain pipe liner, and further, said sleeve being received within said reduced diameter portion of said cylindrical member whereby said drain pipe liner is radially compressed between said sleeve and said drain pipe to provide a relatively concentrated residual stress which radially grips the sleeve to prevent pullout thereof and to enhance the sealing relationship with respect to the drain pipe; and

an internally threaded nut threadably receiving said 

1. A drain assembly useful for connecting a basin liner having an opening therein, which comprises a drain pipe having an outwardly extending flange thereon; a resilient, annular drain pipe liner having an encircling lip with a compressible, cylindrical member extending therefrom, a portion of said cylindrical member being received within said drain pipe, said portion having a radially reduced internal diameter portion of smaller inner diameter than the inner diameter of said cylindrical member adjacent said lip and having an internal tapered sidewall portion immediately adjacent said reduced diameter portion; a rigid sleeve having an annular rim at one end, said sleeve having an outer diameter larger than the inner diameter of said reduced diameter portion and said tapered sidewall portion, said sleeve adapted to be inserted through said opening in said basin liner so that said basin liner is positioned between said rim and said encircling lip on said drain pipe liner, and further, said sleeve being received within said reduced diameter portion of said cylindrical member whereby said drain pipe liner is radially compressed between said sleeve and said drain pipe to provide a relatively concentrated residual stress which radially grips the sleeve to prevent pullout thereof and to enhance the sealing relationship with respect to the drain pipe; and an internally threaded nut threadably receiving said drain pipe liner for adjustably positioning said encircling lip adjacent said basin liner and for adjustably positioning said drain pipe liner longitudinally within said drain pipe, said nut being in registration with and overlying said flange. 